在QListView中获取选定项

Question

我试图得到选定的项目，当它按下一个按钮。我想要禁用按钮，直到项目被选中。我不知道我需要的方法是在模型类、QListView类中，还是应该使用这两个类的方法组合

这是我的密码

QListView.py

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_QListView(object):
    def setupUi(self, QListView):
        QListView.setObjectName("QListView")
        QListView.resize(357, 300)
        self.centralwidget = QtWidgets.QWidget(QListView)
        self.centralwidget.setObjectName("centralwidget")
        self.listView = QtWidgets.QListView(self.centralwidget)
        self.listView.setGeometry(QtCore.QRect(45, 34, 256, 192))
        self.listView.setObjectName("listView")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(141, 238, 75, 23))
        self.pushButton.setObjectName("pushButton")
        QListView.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(QListView)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 357, 21))
        self.menubar.setObjectName("menubar")
        QListView.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(QListView)
        self.statusbar.setObjectName("statusbar")
        QListView.setStatusBar(self.statusbar)

        self.retranslateUi(QListView)
        QtCore.QMetaObject.connectSlotsByName(QListView)

    def retranslateUi(self, QListView):
        _translate = QtCore.QCoreApplication.translate
        QListView.setWindowTitle(_translate("QListView", "List View"))
        self.pushButton.setText(_translate("QListView", "Selected"))

mainQListView.py

from QListView import Ui_QListView
from PyQt5 import QtCore, QtGui, QtWidgets 

class ListView(QtWidgets.QMainWindow, Ui_QListView):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.pushButton.setEnabled(False)
        model = QtGui.QStandardItemModel()
        for i in range(10):
            model.appendRow(QtGui.QStandardItem(str(i)))
        self.listView.setModel(model)
        self.pushButton.clicked.connect(self.getSelectedItem)

    def getSelectedItem(self):
        pass

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    ui = ListView()
    ui.show()
    sys.exit(app.exec_())

​

​

Answer 1

您必须使用selectedIndexes方法获取所选项的QModelIndex，并使用itemFromIndex获取QStandardItem：

class ListView(QtWidgets.QMainWindow, Ui_QListView):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.pushButton.setEnabled(False)
        model = QtGui.QStandardItemModel()
        for i in range(10):
            model.appendRow(QtGui.QStandardItem(str(i)))
        self.listView.setModel(model)

        self.listView.selectionModel().selectionChanged.connect(
            self.handle_selection_changed
        )
        self.pushButton.clicked.connect(self.handle_clicked)

    def handle_selection_changed(self):
        self.pushButton.setEnabled(bool(self.listView.selectedIndexes()))

    def handle_clicked(self):
        for index in self.listView.selectedIndexes():
            item = self.listView.model().itemFromIndex(index)
            print(item.text())

注意：不建议新类、变量或新文件的名称与现有元素的名称一致，因为它会生成无声错误(这是调试中最复杂的错误)，因此我建议您更改QListView.py文件的名称。